content: /*
   * Copyright 2011-2016 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package ix;
  
  import java.util.Iterator;
  
  /**
   * A base iterator that references an upstream iterator and manages
   * the state between hasNext() and the next() calls; plus defines
   * the remove() to throw UnsupportedOperationException.
   * @param <T> the source value type
   * @param <R> the result value type
   */
  public abstract class IxSourceIterator<T, R> extends IxBaseIterator<R> {
  
      /** The upstream's iterator. */
      protected final Iterator<T> it;
  
      public IxSourceIterator(Iterator<T> it) {
          this.it = it;
      }
  }
  